Combined seat and back support unit



FIG. 1 is a side elevational view of a combined seat and back support unit showing my design;

FIG. 2 is a rear elevational view; and

FIG. 3 is a front elevational view thereof;

FIG. 4 is a side elevational view of a modified form of the design shown in FIG. 1;

FIG. 5 is a rear elevational view; and

FIG. 6 is a front elevational view thereof.

The sides of the seating unit not shown are mirror images of the respective sides shown in FIGS. 1 and 4. 

The ornamental design for a combined seat and back support unit, as shown and described. 